Door buffer



May 8, 1934.

G. P. SELBY 1,958,318

DOOR BUFFER Filed May 24, 1933 2 Sheets-Sheet l INVENTOR GEORGE Pf/VEQJESELBY NEY.

G. P. SELBY May 8, @348 DOOR BUFFER Filed May 24, 1933 2 Sheets-Sheet 2 E l @.&.

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E E Q WW6 l mf /no v Eli val ff a iented May 8, 1934' UNITED STATES PATENT OFFIE Application May 24, 1933, Serial No. 672,674

1 Claim.

This invention relates to improvements in door buffers and has particular reference to a device for preventing a doorv from engaging a wall or baseboard.

A further object is to produce a device of this character which will also have a dampening effect upon the action of the door so that the actual contacting of the buffer will be reduced.

Another object is to produce a device which may be attached to any ordinary door.

An additional object is to produce adevice which is neat in appearance.

A still further object is to produce a device which may be adjusted to accommodate for various conditions.

Other objects and advantages will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification and in which like numerals are employed to designate like parts throughout the same,

Fig. 1 is a fragmentary side elevation of a portion of a door having my invention applied thereto, the parts being shown in cross section,

Fig. 2 is an enlarged horizontal detail cross sectional View,

Fig. 3 is a plan view of my hinge,

Fig. i is an enlarged plan view of my device with the cover plate removed,

Fig. 5 is a cross sectional view on the line 55 of Fig. 4,

Fig. 6 is a plan view of my device showing the parts in retracted position, and

Fig. 7 is a perspective view illustrating the manner in which adjustment may be accomplished.

The ordinary house door employs no checking means to prevent its bumping when being opened, other than floor stops, which floor stops introduce severe strains and the rubber portion of the floor stops are often removed and rapidly deteriorate with age. Applicant has, therefore, devised a bufier which is incorporated in the door and acts to retard the action of the door before a stop is engaged.

In the accompanying drawings wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral- 5 designates a door having a bore 6 formed therein. This bore is in alignment with the door hinge plate'7. The casing hinge plate is designated by the numeral 8 and the pintle by the numeral 9. The plate 7 has a portion thereof cut away and a lever 11 positioned therein, which ing plate 8. This lever 11 is engaged by the 69 head of an adjusting screw 17 which screw enters a fitting 18, which is attached to one end of a spring 19. The opposite end of this spring is connected by a wire 21 to one arm of a bell crank lever 22 (see Figs. 4 and 6). This bell 55 crank lever is in turn connected to a link 23 which link is pivoted to a bumper arm 24 fulcrumed as at 26. A spring 27 has one of its ends secured at 28 and its opposite end secured at 29 to the pivotal connection between the bell crank 22 and the link 23. A pad 31 is mounted upon the wall or baseboard so that the end of the bumper arm may engage the same, should the door be moved far enough.

The result of this construction is that when the i5 door is closed as shown in Fig. 1, the arm 24 will be in substantially a vertical position and substantially flush with the face plate covering its supporting and operating mechanism. When the door is opened the first movement of the door will 8 not cause any action of the pads. However, as soon as the door has reached a pre-determined position (which is established by the adjustment betweenthe tongue 12 of the lever 11 and the teeth of the adjusting stop), the stop 16 will engage the plate 8, as indicated in Fig. 2, and will prevent further movement of the lever 11 upon the pintle 9. As the hinge 7 moves away from the lever 11 the effect will be to place tension upon the spring 19, which tension will be transmitted through the wire 21 to the bell crank 22 and exert a pull upon the spring 27. Since the pull upon the spring 19 is greater than the tension of the spring 2'7, then the spring 2'7 will begin to stretch, thus permitting the link 23 to v pull the bumper arm from its vertical position within the confines of the door to a horizontal position, so as to engage the pad secured upon the wall surface.

It will thus be seen that by moving the adjusting stop 14, my device will operate on doors which swing through any degree of are, such as for instance, a door which can only swing ninety degrees or a door which may swing one hundred and eighty degrees. that the springs are first stretched, it will be apparent that the stretching efi'ect of the springs also acts to soften the blow should the bumper arm come into engagement with the pad. Further when the door starts to close, the action 1 Also through the fact otthesprlngswillbesuchtbattheywilltend to close the door after it has been released.

It is to be understood that the form of my invention herewith shown and described is to be 6 taken as a preferred example of the same and and free to rotate thereabcut, means for limiting the free movement of said lever beyond certain limits, a bumper arm mounted in said door at a remote point from said hinged plates and in horizontal alignment therewith, an extensible member connected to said lever and extending into said door, a spring member secured to said extensible member, and a lever system interposed between said bumper and said spring, whereby said bumper is moved from a. vertical position to a horizontal position when tension is placed upon said spring.

GEORGE PENROSE SELBY. 

